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Finding the Fourth Proportional to 279,581.29, 385,808.47 and 158,706.42

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Solution

The fourth proportional to 279,581.29, 385,808.47 and 158,706.42 is: 219,007.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,581.29 : 385,808.47 = 158,706.42 : x
  2. Step 2: Convert to fraction form
    279,581.29/385,808.47 = 158,706.42/x
  3. Step 3: Cross multiply
    279,581.29x = 385,808.47 × 158,706.42
  4. Step 4: Simplify right side
    279,581.29x = 61,230,281,079.38
  5. Step 5: Solve for x
    x = 61,230,281,079.38/279,581.29
  6. Step 6: Final answer
    x = 219,007.08

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.